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Method for network interaction television system realizing time-shift function

A TV system and network interaction technology, applied in the field of network multimedia, can solve problems such as unsatisfactory implementation effects

Inactive Publication Date: 2006-07-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, IPTV implements the time-shifting function basically in the form of unicast. Due to the network bandwidth, the unicast time-shifting function has encountered great difficulties in practice, and the implementation effect is not ideal.

Method used

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  • Method for network interaction television system realizing time-shift function
  • Method for network interaction television system realizing time-shift function
  • Method for network interaction television system realizing time-shift function

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Embodiment Construction

[0025] In order to solve the problem of the existing IPTV time-shifting technology, the present invention provides a method for realizing IPTV time-shifting by adopting the multicast buffered semi-live technology. The overall workflow of the method provided by the invention is described in detail below, see figure 1 shown. exist figure 1 , the system collects streaming media data from the multicast stream and stores it in the buffer (step 124); the system scans the data in the buffer and marks key frame data (step 122). Step 124 and step 122 are two steps performed simultaneously. In step 102, the set-top box responds to the user's time-shift request, exits the multicast lease, sends an on-demand request to the server, and agrees with the server on the current reference time. In step 104, the server responds to the STB request and enters a buffered semi-live state; the buffered semi-live state is also called an on-demand state. In step 106, it is judged whether the set-top...

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Abstract

Said invention provides a method to realize time shifting function sow in network interactive tv ( IPTV ), system obtaining data from multicasting stream and putting in buffer zone , real time scanning buffer zone marking key frame. It promises a current system time reference time reference between Set-top box and stream medium server. When user given off skip forward, skip backwards, dragging, playing after pause etc request, set-top box exiting multicasting group, transmitting ordering request to stream medium server which responses request from set-top box and calculating time reference and client request required playing time difference finding out beginning playing position in buffer zone, then stream medium server relevant playing according to user different request, said invention can effectively complete skip forward, skip backwards, dragging time shifting function.

Description

technical field [0001] The invention belongs to the technical field of network multimedia. Specifically, it relates to a method for realizing a time-shifting function in an Internet interactive television system (IPTV). Background technique [0002] Streaming media refers to the use of streaming technology to transmit audio, video and multimedia files in the network. The feature of streaming transmission technology is to compress continuous audio and video information and put it on the server of the network, and network users can listen or watch while downloading, without having to wait until the entire file is downloaded. At present, streaming media application technology is getting more and more attention. Such as video conferencing system, video on demand system, live video system, etc. Recently, more and more applications tend to order or live TV programs through TV. Such as NVOD (quasi video on demand), IPTV (interactive television) and so on. In the IPTV system or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/173H04N7/24H04L12/00H04N21/231H04N21/232H04N21/637H04N21/6408
Inventor 叶德建徐良基姜秀艳
Owner FUDAN UNIV
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